North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Customer-facing ACLs
On Mon, Mar 10, 2008 at 7:58 PM, Ang Kah Yik <[email protected]> wrote: > > Hi Justin (and all others on-list) > > I understand your grounds for blocking outbound SMTP for your customers > (especially those on dynamic IP connections). > It probably will do good to block infected customers that are spewing > spam all over the world. > > However, considering the number of mobile workers out there who send > email via their laptops to corporate SMTP servers, won't blocking > outbound SMTP affect them? > vpns fix this... > Since these corporate types (I'm guessing here) are probably unaware of > how to change their email client's SMTP configurations, chances are that > blocking outbound SMTP will probably cause quite a lot of pain. > uunet dialup has blocked port25 in both directions since 2002... little to no complaints. (well, they may have received complaints since I left, but... thank John StClair for the work behind that filtering actually.) > After all, there are also those who frequently move from place to place > so they're going to have to keep changing SMTP servers every time they > go to a new place that's on a different ISP. > many config's actually just use WCCP to transparently redirect your smtp to an authorized SMTP server as Andy Dills points out. -Chris
|